Julian Gomez,Jessica Ceballos,Edward

Reyes,Maria RinconChapter 16 Darwin's Theory

of EvolutionSection II.Period 4

II. Idea's That Shaped Darwin's Thinking

A. An Ancient, Changing Earth

● 1875 Hutton presents hypothesis● on how geological process have shaped

Earth

 1. Hutton and Geological Change

● Geological process and geological features,like mountains,valleys,and layers of rocks that look folded

 

2. Lyell’s Principles of Geology

B. Lamarck’s Evolutionary Hypothesis

       ● Acquired characteristics● species become better over time     

1. How Did Lamarck Propose That Species Evolve?

     ● species characteristics change over time ● change over time using/not using body

parts

2. Lamarck’s Idea

      ● Acquired characteristics● adapt by using body in new ways

3. Evaluating Lamarck’s Hypotheses

      ● traits are passed down (inherited)● evolution doesn't mean over time species

become better

C. Population Growth

● Thomas Malthus notes birth rates are surpassing the rate of death in pop.

What was Malthus' View of Population Growth?

● 1798, Malthus thinks human pop. growing unchecked will result in scarce resources.

 

    D. Artificial Selection

● artificial selection is selective breeding of plants and animals

●

1.How is Inherited Variation used in Artificial Selection?

● farmers would breed trees that produced the largest fruit or cows that had more milk

● Darwin tested artificial selection by raising and breeding pigeons